| 摘要 |
One end portion of a cable is gripped by one head and the opposite end portion of the cable is gripped by another head prior to the heads being spread apart to pull the cable end portions in opposite directions and impart tension to the cable. Without losing the initially imparted tension, one head may be released from and returned reversely along the cable and then may be shifted through another active stroke to place additional tension in the cable.
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